Gas Furnaces

Furnace service.

AA-AIR Company is the leading HVAC company in Knoxville, TN, for your furnace service needs. We service and repair all makes and models. If you need furnace service, we are the company to call. Our skilled technicians are qualified to solve just about any repair or installation that you throw at us.

How Much Money Can a New Furnace Save You?

Our AFUE energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's AFUE value and compare it to a newer, more efficient system. You can even customize it to better match your home's system for a more accurate calculation.

AFUE Energy Savings Calculator

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This calculator does not guarantee actual costs or savings and is only to be used for educational purposes.

Customize to Your Home

Adjust these settings for a more accurate calculation:

State

Province

Region

Rate ($/Mcf)

BTUs

Average Annual Heating Hours***


Historical Comparison

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** Data from U.S. Energy Information Administration
*** Data from 2002 EPA study

** Data for Canadian cities from nrcan.gc.ca
*** Data from weatherdatadepot.com

Furnace Repair

Don’t get left in the cold! Is your furnace acting up, blowing cold air, or making too much noise? Our experienced team of professionals is here to keep your home warm and cozy. We repair all makes and models, and we will never try to sell you a service that you don’t need. Our technicians are honest and hard working, and we’re always transparent and fair about the work we do.

Furnace Replacement

Sometimes a repair is not sufficient to fix your furnace. Sometimes a new furnace is the most cost-effective and energy-efficient way to go. We will always be honest with you about a possible furnace replacement. We value our time and your money––we don’t want to perform repairs or service on an appliance that is in need of replacement.

If you do need a furnace replacement, we know how overwhelming it can be. Here are some of the frequently asked questions about furnaces that we get from some of our Knoxville, TN residents:

What Are The Different Types Of Furnaces?

Single Stage: A single-stage furnace has only one stage of operation. It can either be turned on or turned off.

Two Stage: A two-stage furnace has two settings––full and half speed. This is a more efficient way to heat and provides for better comfort, because it can move the air at a slower pace.

Variable Stage or Modulating: A variable-stage or modulating furnace modulates the speed and heat output based on the temperature outside and the desired comfort level. This furnace only works as much as you need it, making this type the most energy-efficient type of furnace.

What Is AFUE?

AFUE, or Annualized Fuel Utilization Efficiency, is a measure of furnace-heating efficiency. The higher the AFUE, the more efficient the furnace.

What Size Furnace Do I Need?

We can calculate the correct size furnace for your home. The number of BTUs, or British Thermal Units, needed to heat your home is dependent on a number of variables. Contrary to what you might think, a bigger furnace may not necessarily mean more heating power for your home. Call us at AA-AIR Company, and we can set up an appointment to calculate the furnace size you might need.

Gas Furnace Installation in Oak Ridge, TN, 37840-1152

12/16/2022
“Erin helped us select the heating/cooling unit best suited to our needs and the team of Joe, Chip, Ronnie and Don installed the unit. The team did a great job removing the old unit and replacing it with a new system.. We thank them all for their diligence in getting the job done and quickly.”
- Carolann A.

Gas Furnace Replacement in Powell, TN, 37918

10/06/2022

“I’m so grateful I chose AA-Air to replace both of my HVAC units. After getting the runaround from countless other companies, and dealing with people that didn’t show up on time, wouldn’t return calls, were not able to even acquire equipment to be installed or provide a timeline for when it could be done, I met with Larry who instilled confidence about his team and what is different about this company from others. I had a large group of installers show up on time, give me a courtesy call that they were on the way, were completely professional, explained everything I had questions about, and did a great job getting both units done in one day. I highly recommend this company.”

- Diana H.

Gas Furnace Maintenance in Knoxville, TN 37918

February 1, 2016

“Right on time, professional, courteous and knowledgeable staff. Consistently reliable work. If you are looking for a long term, heating/cooling company – look no further. These guys are top notch and I won't use anybody else!”

– Laurie B.

- Laurie B.

Need Furnace Service?

Contact the experts at AA-Air Company.

Call us at 865-213-1354!